/Engine/Source/Runtime/MovieScene/Public/Channels/MovieSceneDoubleChannel.h
Add keys with these times to channel. The number of elements in both arrays much match or nothing is added. Also assume that the times are greater than last time in the channel and are increasing. If not bad things can happen.
void AddKeys ( const [TArray](API\Runtime\Core\Containers\TArray)< [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) > & InTimes, const [TArray](API\Runtime\Core\Containers\TArray)< [FMovieSceneDoubleValue](API\Runtime\MovieScene\Channels\FMovieSceneDoubleValue) > & InValues )